将rgb空间，转为HSV或yCBCR空间实现通过肤色检测人脸区域，用openCV实现-The rgb space to HSV space to achieve through the skin or yCBCR face region detection with openCV achieve

首先实现基于肤色的人脸检测与追踪，然后可以定位眼睛的位置。-first it can detect face and tracking based on skin color,then it can detect the location of the eyes.